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Critical · 10.0 CVE-2026-25142 EUVD-2026-5407GHSA-9p4w-fq8m-2hp7

SandboxJS Prototype Pollution -> Sandbox Escape -> RCE

Published Feb 2, 2026 · Updated Feb 4, 2026 · Assigned by GitHub_M

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.

Affected products

VendorProductAffectedFixed
nyariv SandboxJS < 0.8.27 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @nyariv/sandboxjs < 0.8.27 0.8.27 GHSA-9p4w-fq8m-2hp7

References